Hematological changes in white spot syndrome virus-infected shrimp, Fenneropenaeus chinensis (Osbeck) |
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Authors: | Shouming Feng Wenbin Zhan Jing Xing Jun Li Kai Yang Jing Wang |
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Institution: | (1) Laboratory of Pathology and Immunology of Aquatic Animals, LMMEC, Ocean University of China, Qingdao, 266003, P. R China;(2) Tianjin Fishery Institute, Tianjin, 300221, P. R. China |
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Abstract: | The pathological changes of hemocytes in the haemolymph and hepatopancreas were examined in experimentally and naturally WSSV
(white spot syndrome virus) infected Fenneropenaeus chinensis. The results showed that the pathological manifestations of hemocytes were similar among moribund shrimps infected via injection,
feeding and by nature. Firstly, the total hemocyte counts (THCs) in WSSV-infected shrimp were significantly lower than those
in healthy shrimp. Secondly, necrotic, broken and disintegrated cells were often observed, and a typical hematolysis was present
in the haemolymph smear of WSSV-infected shrimp. Thirdly, necrosis and typical apoptosis of hemocytes were detected with TEM
in the peripheral haemolymph of WSSV-infected shrimp. Hyalinocytes and semi-granulocytes with masses of WSSVs in their nuclei
often appeared, whereas no granular hemocytes with WSSV were found in the hepatopancreas of moribund infected shrimps. All
our results supported that hemocytes were the main target cells of WSSV, and hyalinocytes and semigranular hemocytes seemed
to be more favorable for WSSV infection in F. chinensis. |
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Keywords: | hemocyte pathological changes WSSV Fenneropenaeus chinensis (Osbeck) |
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